using System;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        string word = Console.ReadLine();

        StringBuilder reversedWord = new StringBuilder();

        for(int i=word.Length-1; i>=0; i--)

        {

            reversedWord.Append(word[i]);

        }

        Console.WriteLine(reversedWord.ToString());

    }

}